Julianne Moore’s thriller The Forgotten capitalized on its lack of intriguing box office competition to become the weekend’s No. 1 film.

The scary supernatural movie, about a woman trying to prove that her dead son is more than just a figment of her imagination, grossed $22 million in its opening weekend, according to studio estimates. Its take was more than the rest of the top five combined. The action drama Sky Captain and the World of Tomorrow slipped a discouraging 57 percent in its second weekend to just $6.7 million, while Bernie Mac’s baseball comedy Mr. 3000 finished third, down 42 percent to $5 million.

Tying for fourth place were Resident Evil: Apocalypse and the new Katie Holmes romantic comedy First Daughter, with $4 million each. That’s less than the $6.1 million debut last year of Mandy Moore’s Chasing Liberty – like First Daughter, also about presidential offspring. Though both films were shot around the same time, it obviously doesn’t help to be perceived as a copycat.